# Atlas VII

CAISO Batteries · https://askthegrid.com/assets/facilities/atlas-vii

Atlas VII is a battery energy storage facility with 300 MW of EIA-reported operating capacity and 1,200 MWh of reported energy capacity in La Paz County, Arizona, registered as EIA Plant ID 68322. Atlas VII LLC is the registered plant entity or operator. Public project records list 2 battery units. Its grid role is standalone battery storage providing capacity and energy under 15-year Southern California Edison resource-adequacy contracts to support CAISO-grid stability, reliability, and resilience.

## Key facts

- Technology: Batteries
- Power capacity: 300 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CISO (California ISO/CAISO)
- Substation: Cielo Azul
- Point of interconnection: Cielo Azul
- Transmission owner: California Independent System Operator (CAISO)

## Source-backed facts

- Owner logo domain: transgridenergy.com — Shaping sustainable energy solutions for a more resilient grid · confidence: medium
- Description: Atlas VII is a 300 MW / 1,200 MWh standalone battery energy storage system in La Paz County, Arizona. The plant has two battery generators, ALT7A at 180 MW and ALT7B at 120 MW, and is associated with the CISO balancing authority and CAISO market. TransGrid lists Atlas VII as in operation. — Our Projects - TransGrid Energy · confidence: high
- Parties.2: {"relationship":"Parent company of TransGrid Energy","name":"Hanwha FutureProof","official_url":"https://hanwhafutureproof.com/"} — Shaping sustainable energy solutions for a more resilient grid · confidence: high
- Parties.4: {"relationship":"Resource adequacy contract counterparty","name":"Southern California Edison","official_url":"https://www.sce.com/"} — Source · confidence: medium
- Parties.5: {"relationship":"Lead arranger and lender in the Atlas VII/Atlas IX financing package","name":"Société Générale","official_url":"https://www.societegenerale.com/"} — Source · confidence: medium
- Parties.6: {"relationship":"Lead arranger and lender in the Atlas VII/Atlas IX financing package","name":"Santander","official_url":"https://www.santander.com/"} — Source · confidence: medium
- Parties.7: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"BNP Paribas","official_url":"https://group.bnpparibas/"} — Source · confidence: medium
- Parties.8: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"Banco Bilbao Vizcaya Argentaria (BBVA)","official_url":"https://www.bbva.com/"} — Source · confidence: medium
- Parties.9: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"East West Bank","official_url":"https://www.eastwestbank.com/"} — Source · confidence: medium
- Parties.10: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"Shinhan Bank","official_url":"https://www.shinhan.com/"} — Source · confidence: medium
- Parties.11: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"Siemens Financial Services","official_url":"https://www.siemens.com/"} — Source · confidence: medium
- Parties.12: {"relationship":"Lender in the Atlas VII/Atlas IX financing package","name":"Associated Bank","official_url":"https://www.associatedbank.com/"} — Source · confidence: medium
- Duration hours: 4 — Our Projects · confidence: medium
- Energy mwh: 1200 — Our Projects · confidence: high
- Significance: Atlas VII is a 300 MW / 1,200 MWh standalone battery energy storage system in La Paz County, Arizona. Its CPUC-approved resource-adequacy arrangement was sized at 300 MW of nameplate capacity and 225 MW of incremental September net qualifying capacity under a 15-year term, supporting California grid reliability. — Source · confidence: medium
- Quality notes: ["The disclosed $705 million debt financing, $270 million hybrid tax-equity commitment, and up to $490 million investment-tax-credit transfer applied to the combined Atlas VII and Atlas IX portfolio; the sources do not allocate those amounts to Atlas VII individually.","The reviewed project, regulatory, owner, and financing materials do not disclose an acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year for Atlas VII.","The June 1, 2025 date in the CPUC materials is the scheduled initial delivery date, whereas the EIA-derived plant record identifies October 1, 2025 as the first-unit online date; these are different milestones."] — Our Projects · confidence: medium
- Quality notes: ["The disclosed $705 million debt financing, $270 million hybrid tax-equity commitment, and up to $490 million investment-tax-credit transfer applied to the combined Atlas VII and Atlas IX portfolio; the sources do not allocate those amounts to Atlas VII individually.","The reviewed project, regulatory, owner, and financing materials do not disclose an acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year for Atlas VII.","The June 1, 2025 date in the CPUC materials is the scheduled initial delivery date, whereas the EIA-derived plant record identifies October 1, 2025 as the first-unit online date; these are different milestones."] — Source · confidence: medium
- Timeline: [{"event":"SCE resource-adequacy contract recorded","date":"2024-03-21","detail":"A CPUC draft resolution identified TransGrid Atlas VII as a 300 MW project with 225 MW of incremental September net qualifying capacity, a 15-year term, and a scheduled initial delivery date of June 1, 2025."},{"event":"Project financing closed","date":"2024-12","detail":"TransGrid closed $705 million of debt financing and documented a $270 million hybrid tax-equity commitment and up to $490 million of investment-tax-credit transfers for the combined Atlas VII and Atlas IX projects."},{"event":"Construction underway","date":"2025-02-06","detail":"Qcells was identified as the EPC contractor, and Atlas VII and Atlas IX were reported under construction with commercial operation expected later in 2025."},{"event":"Scheduled initial delivery date","date":"2025-06-01","detail":"The CPUC contract record scheduled Atlas VII's initial delivery date for June 1, 2025."},{"event":"First unit online","date":"2025-10-01","detail":"The plant record identifies October 1, 2025 as Atlas VII's first-unit online date; the plant is listed as operational with two battery generators totaling 300 MW."},{"event":"Acquisition, sale, and predecessor-owner history","date":null,"detail":"No disclosed acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year was identified for the exact Atlas VII plant."},{"event":"Expansion, retirement, and repowering history","date":null,"detail":"No disclosed expansion, retirement, or repowering milestone was identified for the exact Atlas VII plant."}] — Source · confidence: medium
- Timeline: [{"event":"SCE resource-adequacy contract recorded","date":"2024-03-21","detail":"A CPUC draft resolution identified TransGrid Atlas VII as a 300 MW project with 225 MW of incremental September net qualifying capacity, a 15-year term, and a scheduled initial delivery date of June 1, 2025."},{"event":"Project financing closed","date":"2024-12","detail":"TransGrid closed $705 million of debt financing and documented a $270 million hybrid tax-equity commitment and up to $490 million of investment-tax-credit transfers for the combined Atlas VII and Atlas IX projects."},{"event":"Construction underway","date":"2025-02-06","detail":"Qcells was identified as the EPC contractor, and Atlas VII and Atlas IX were reported under construction with commercial operation expected later in 2025."},{"event":"Scheduled initial delivery date","date":"2025-06-01","detail":"The CPUC contract record scheduled Atlas VII's initial delivery date for June 1, 2025."},{"event":"First unit online","date":"2025-10-01","detail":"The plant record identifies October 1, 2025 as Atlas VII's first-unit online date; the plant is listed as operational with two battery generators totaling 300 MW."},{"event":"Acquisition, sale, and predecessor-owner history","date":null,"detail":"No disclosed acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year was identified for the exact Atlas VII plant."},{"event":"Expansion, retirement, and repowering history","date":null,"detail":"No disclosed expansion, retirement, or repowering milestone was identified for the exact Atlas VII plant."}] — Our Projects - TransGrid Energy · confidence: medium
- Commercial parties.4: {"relationship":"Resource-adequacy contract counterparty","name":"Southern California Edison","detail":"Counterparty to the 15-year resource-adequacy contracts supporting capacity and energy delivery for California customers.","official_url":"https://www.sce.com/"} — Source · confidence: high
- Commercial parties.5: {"relationship":"Lead arranger and lender","name":"Société Générale","detail":"Lead arranger and lender in the $705 million project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.societegenerale.com/"} — Source · confidence: high
- Commercial parties.6: {"relationship":"Lead arranger and lender","name":"Santander","detail":"Lead arranger and lender in the $705 million project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.santander.com/"} — Source · confidence: high
- Commercial parties.7: {"relationship":"Lender","name":"BNP Paribas","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://group.bnpparibas/"} — Source · confidence: high
- Commercial parties.8: {"relationship":"Lender","name":"Banco Bilbao Vizcaya Argentaria (BBVA)","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.bbva.com/"} — Source · confidence: high
- Commercial parties.9: {"relationship":"Lender","name":"East West Bank","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.eastwestbank.com/"} — Source · confidence: high
- Commercial parties.10: {"relationship":"Lender","name":"Shinhan Bank","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.shinhan.com/"} — Source · confidence: high
- Commercial parties.11: {"relationship":"Lender","name":"Siemens Financial Services","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.siemens.com/"} — Source · confidence: high
- Commercial parties.12: {"relationship":"Lender","name":"Associated Bank","detail":"Member of the project-loan consortium for the combined Atlas VII and Atlas IX financing.","official_url":"https://www.associatedbank.com/"} — Source · confidence: high
- Timeline.0: {"event":"SCE resource-adequacy contract recorded","date":"2024-03-21","detail":"A CPUC draft resolution identified TransGrid Atlas VII as a 300 MW project with 225 MW of incremental September net qualifying capacity, a 15-year term, and a scheduled initial delivery date of June 1, 2025."} — Source · confidence: medium
- Timeline.3: {"event":"Scheduled initial delivery date","date":"2025-06-01","detail":"The CPUC contract record scheduled Atlas VII's initial delivery date for June 1, 2025."} — Source · confidence: high
- Timeline.5: {"event":"Acquisition, sale, and predecessor-owner history","date":null,"detail":"No disclosed acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year was identified for the exact Atlas VII plant."} — Our Projects - TransGrid Energy · confidence: medium
- Timeline.6: {"event":"Expansion, retirement, and repowering history","date":null,"detail":"No disclosed expansion, retirement, or repowering milestone was identified for the exact Atlas VII plant."} — Our Projects - TransGrid Energy · confidence: medium
- Quality notes.1: The reviewed project, regulatory, owner, and financing materials do not disclose an acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year for Atlas VII. — Our Projects - TransGrid Energy · confidence: medium
- Quality notes.2: The June 1, 2025 date in the CPUC materials is the scheduled initial delivery date, whereas the EIA-derived plant record identifies October 1, 2025 as the first-unit online date; these are different milestones. — Source · confidence: high
- Operating status: operating — Our Projects - TransGrid Energy · confidence: high

## Timeline

- 2024-03-21 — SCE resource-adequacy contract recorded
  A CPUC draft resolution identified TransGrid Atlas VII as a 300 MW project with 225 MW of incremental September net qualifying capacity, a 15-year term, and a scheduled initial delivery date of June 1, 2025.
  Source: Source (https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M527/K800/527800877.pdf)
- 2024-12 — Project financing closed
  TransGrid closed $705 million of debt financing and documented a $270 million hybrid tax-equity commitment and up to $490 million of investment-tax-credit transfers for the combined Atlas VII and Atlas IX projects.
  Source: Source (https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona/)
- 2025-02-06 — Construction underway
  Qcells was identified as the EPC contractor, and Atlas VII and Atlas IX were reported under construction with commercial operation expected later in 2025.
  Source: Source (https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona/)
- 2025-06-01 — Scheduled initial delivery date
  The CPUC contract record scheduled Atlas VII's initial delivery date for June 1, 2025.
  Source: Source (https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M527/K800/527800877.pdf)

## Sources

- [Shaping sustainable energy solutions for a more resilient grid](https://transgridenergy.com/) — transgridenergy.com · tier other
- [Our Projects - TransGrid Energy](https://transgridenergy.com/our-projects/) — transgridenergy.com · tier other
- [Source](https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona/) — us.qcells.com · tier other
- [Source](https://us.qcells.com/blog/lg-energy-solution-vertech-and-qcells-partner-to-deliver-5-gwh-of-u-s-energy-storage-projects/) — us.qcells.com · tier other
- [Source](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M527/K800/527800877.pdf) — docs.cpuc.ca.gov · tier regulatory
- [Source](https://transgridenergy.com/our-projects) — transgridenergy.com · tier other
- [Source](https://hanwha.com/newsroom/news/press-releases/hanwhas-transgrid-energy-secures-over-14-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona.do) — hanwha.com · tier other
- [Source](https://us.qcells.com/blog/transgrid-energy-secures-over-1-4-billion-in-financing-for-a-450-mw-1800-mwh-portfolio-of-stand-alone-battery-storage-projects-in-arizona) — us.qcells.com · tier other
- [2026 NQC List](https://www.caiso.com/documents/net-qualifying-capacity-report-for-compliance-year-2026.xlsx) — caiso.com · tier other
- [Source](https://www.caiso.com/documents/metering-exemption-listing-report-2026.pdf) — caiso.com · tier other
- [555812572.docx](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M555/K812/555812572.docx) — docs.cpuc.ca.gov · tier regulatory
- [CAISO battery fleet crosses 15 GW after record 4.7 GW year - Research | Modo Energy](https://modoenergy.com/research/en/caiso-battery-fleet-2025-q4-15gw-interconnection-queue-standalone-colocated) — modoenergy.com · tier other

## Data quality

- The reviewed project, regulatory, owner, and financing materials do not disclose an acquisition purchaser, seller, predecessor owner, sale consideration, or transaction month and year for Atlas VII. The June 1, 2025 date in the CPUC materials is the scheduled initial delivery date, whereas the EIA-derived plant record identifies October 1, 2025 as the first-unit online date; these are different milestones.

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